Control systems Safety valves
4
Capacity Table - Steam - 3% Overpressure - kg/h
Orifice Designation / Actual Area (cm²)
Set Pressure (bar g)
F Q 2.116 3.464 5.432 8.864 12.69 16.47 19.70 24.81 29.89 44.06 76.20 G H J K K2 L M N P
1.0
206 337 528
862
1,234 1,602 1,916 2,414 2,908 4,286 7,413
1.5
254 415 651 1,063 1,521 1,974 2,361 2,974 3,583 5,282 9,134
2.0
301 493 774 1,263 1,808 2,346 2,807 3,535 4,258 6,277 10,856
2.5
349 572 897 1,463 2,095 2,718 3,252 4,095 4,933 7,272 12,577
3.0
397 650 1,019 1,663 2,381 3,091 3,697 4,656 5,609 8,268 14,299
3.5
445 728 1,142 1,864 2,668 3,463 4,142 5,216 6,284 9,263 16,020
4.0
493 807 1,265 2,064 2,955 3,835 4,587 5,777 6,959 10,258 17,742
4.5
540 885 1,387 2,264 3,241 4,207 5,032 6,337 7,635 11,254 19,463
5.0
589 965 1,513 2,468 3,534 4,586 5,486 6,909 8,323 12,269 21,219
5.5
638 1,045 1,639 2,675 3,829 4,970 5,944 7,486 9,019 13,294 22,992
6.0
688 1,126 1,765 2,881 4,124 5,353 6,403 8,063 9,714 14,320 24,765
4.7 69
6.5
737 1,206 1,892 3,087 4,420 5,736 6,861 8,641 10,410 15,345 26,538
7.0
786 1,287 2,018 3,293 4,715 6,119 7,319 9,218 11,105 16,370 28,312
7.5
835 1,368 2,145 3,500 5,010 6,503 7,778 9,795 11,801 17,395 30,085
8.0
885 1,448 2,271 3,706 5,305 6,886 8,236 10,373 12,496 18,421 31,858
8.5
934 1,529 2,397 3,912 5,601 7,269 8,695 10,950 13,192 19,446 33,631
9.0
983 1,609 2,524 4,118 5,896 7,652 9,153 11,527 13,888 20,471 35,404
9.5
1,032 1,690 2,650 4,325 6,191 8,036 9,611 12,105 14,583 21,496 37,177
10
1,082 1,771 2,777 4,531 6,487 8,419 10,070 12,682 15,279 22,522 38,950
12
1,279 2,093 3,282 5,356 7,668 9,952 11,903 14,991 18,061 26,623 46,043
14
1,476 2,416 3,788 6,181 8,849 11,485 13,737 17,300 20,843 30,724 53,135
16
1,672 2,738 4,293 7,006 10,030 13,018 15,571 19,610 23,625 34,825 60,228
18
1,869 3,060 4,799 7,831 11,211 14,551 17,404 21,919 26,407 38,926 67,320
20
2,066 3,383 5,305 8,656 12,392 16,084 19,238 24,228 29,189 43,027 74,413
22
2,263 3,705 5,810 9,481 13,574 17,617 21,072 26,537 31,971 47,128 81,506
24
2,460 4,028 6,316 10,306 14,755 19,150 22,905 28,847 34,753 51,229 88,598
26
2,657 4,350 6,821 11,131 15,936 20,683 24,739 31,156 37,535 55,330 95,691
28 2,854 4,672 7,327 11,956 17,117 22,216 26,573 33,465 40,317 59,431 102,783 30 3,051 4,995 7,833 12,781 18,298 23,749 28,406 35,774 43,100 63,532 109,876 32 3,248 5,317 8,338 13,606 19,479 25,282 30,240 38,084 45,882 67,633 116,968
Capacity Table - Steam - 3% Overpressure - kg/h continued on next page
For sizing purpose using the ASME actual areas, the certified coefficient of discharge Kd for air, gas and steam is 0.865 lb/h = Kg/h / 0.4536
TI-P276-01 CTLS Issue 1
Page 9 of 15
SV66H Safety Valve
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